题目内容：
根据以下材料回答题 About50yearsagotheideaofdisabledpeopledoingsportswasneverheardof．ButwhentheannualgamesforthedisabledwerestartedatStrokeMandeville,Englandin1948bySirLudwigGuttmann,thesituationbegantochange．SirLudwigGuttmann,whohadbeendriventoEnglandin1939fromNaziGermany,hadbeenaskedbytheBritishgovernmenttosetupaninjuriescentreatStrokeMandevilleHospitalnearLondon．Hisideasabouttreatinginjuriesincludedsportsforthedisabled．
Inthefirstgamesjusttwoteamsofinjuredsoldierstookpart．Thenextyear,1949,fiveteamstookpart．Fromthosebeginningsthingsdevelopedfast．TeamsnowcomefromabroadtoStrokeMandevilleeveryyear．In1960thefirstOlympicsfortheDisabledwereheldinRome．Now,everyfouryearstheOlympicGamesfortheDisabledareheld,ofpossible,inthesameplaceasthenormalOlympicGames,althoughtheyareorganizedseparately．InotheryearsGamesfortheDisabledarestillheldatStrokeMandeville．Inthe1984wheelchairOlympicGames,1,604wheelchairathletesfromabout40countriestookpart．Unfortunately,theywereheldatStrokeMandevilleandnotinLosAngeles,alongwiththeotherOlympics．
TheGameshavebeenagreatsuccessinpromotinginternationalfriendshipandunderstanding,andinprovingthatbeingdisableddoesnotmeanyoucan'tenjoysports．Onesmallsourceofdis-appointmentforthosewhoorganizeandtakepartinthegames,however,hasbeentheunwilling-nessoftheInternationalOlympicCommitteetoincludethedisabledeventsattheOlympicGamesfortheablebodies．Perhapsafewmoreyearsarestillneededtoconvincethosefortunateenough
nottobedisabledthattheirdisabledfellowathletesshouldnotbeexcluded．
ThefirstgamesforthedisabledwereheldafterSirLudwingGuttmannarrivedinEngland． A．50years
B．21years
C．9years
D．4years
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